Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '611ba26ae40c14a5e7fffafbc10e257258fc36fb2f92dbaba90ef12c1b9dcb08' 
  AND token = 'b8d6jzO42U62dnCktZZoUSI6z0KC+h/mRphGpc7X62k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}